civil engineering MCQs – Page 186

Practise multiple-choice questions from civil engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

civil engineering Mcqs
3701. The slope of isochrone at any point at a given time indicates the rate of change of_______________?
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A. pore water pressure with depth

B. effective stress with depth

C. effective stress with time

D. pore water pressure with time

3702. If the shearing stress is zero on two planes, then the angle between the two planes is________________?
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A. 225

B. 135

C. 90

D. 45

3703. Quick sand is a________________?
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A. type of sand

B. flow condition occurring in cohesive soils

C. flow condition occurring in cohesionless soils

D. flow condition occurring in both cohesive and cohesionless soils

3704. Bishops method of stability analysis_______________?
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A. all of the above

B. neglects the effect of forces acting on the sides of the slices

C. assumes the slip surface as an arc of a circle

D. is more conservative

3705. Coefficient of permeability of soil______________?
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A. increases with the increase in temperature

B. does not depend upon temperature

C. increases with the decrease in temperature

D. none of the above

3706. Coefficient of earth pressure at rest is__________________?
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A. less than active earth pressure but greater than passive earth pressure

B. greater than active earth pressure but less than passive earth pressure

C. greater than both the active earth pressure and passive earth pressure

D. less than both the active and passive earth pressures

3707. Which of the following types of soil is transported by gravitational forces ?
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A. drift

B. dune sand

C. talus

D. loess

3708. If the permeability of a soil is 0.8 mm/sec, the type of soil is_______________?
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A. silt

B. clay

C. sand

D. gravel

3709. Which of the following soils has more plasticity index ?
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A. clay

B. gravel

C. sand

D. silt

3710. Sand particles are made of________________?
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A. illite

B. rock minerals

C. kaolinite

D. montmorillonite

3711. If the sand in-situ is in its densest state, then the relative density of sand is_____________?
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A. 1

B. greater than 1

C. zero

D. between 0 and 1

3712. Effective stress on soil_____________?
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A. increases voids ratio and decreases permeability

B. increases both voids ratio and permeability

C. decreases both voids ratio and permeability

D. decreases voids ratio and increases permeability

3713. Physical properties of a permeant which influence permeability are________________?
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A. viscosity only

B. unit weight only

C. both viscosity and unit weight

D. none of the above

3714. The rise of water table below the foundation influences the bearing capacity of soil mainly by reducing_______________?
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A. cohesion and effective angle of shearing resistance

B. cohesion and effective unit weight of soil

C. effective angle of shearing resistance

D. effective unit weight of soil and effective angle of shearing resistance

3715. According to Atterberg, the soil is said to be of medium plasticity if the plasticity index PI is____________?
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A. 0 < PI < 7

B. 17<PI27

C. 7
3716. When the degree of saturation is zero, the soil mass under consideration represents______________?
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A. two phase system with soil and air

B. three phase system

C. one phase system

D. two phase system with soil and water

3717. Sensitivity of a soil can be defined as___________________?
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A. none of the above

B. percentage of volume change of soil under saturated condition

C. ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state

D. ratio of volume of voids to volume of solids

3718. Coarse grained soils are best compacted by a_______________?
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A. sheeps foot roller

B. vibratory roller

C. rubber tyred roller

D. drum roller

3719. The major principal stress in an element of cohesionless soil within the backfill of a retaining wall is________________?
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A. vertical if the soil is in an active state of plastic equilibrium

B. vertical if the soil is in a passive state of plastic equilibrium

C. inclined at 45 to the vertical plane

D. none of the above

3720. The average coefficient of permeability of natural deposits________________?
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A. parallel to stratification is always greater than that perpendicular to stratification

B. parallel to stratification is always less than that perpendicular to stratification

C. is always same in both directions

D. parallel to stratification may or may not be greater than that perpendicular to stratification